Flemish buttermilk mashed potatoes with grey shrimp, creamy poached egg and butter sauce!
Peel the potatoes and chop them into smaller bits. Transfer them to a medium saucepan and fill it with water until they are submerged. Season with a good pinch of salt.
Place the potatoes over high heat and boil them until cooked through. Then drain them and add them back to the pan with half of the butter and the sour cream (optional).